Thread: Trying to learn Java programming

I am trying to learn Java programming and I am trying to figure out how to call a class to write a larger program. I have included the small part of the program that I am trying to get to work but I keep getting a compiler error. Can anyone help me figure this out. I have also copied in the error that I am getting from TextPad when I try to compile this.

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import javax.swing.JOptionPane;
import java.text.NumberFormat;

public class Chapter7Prog1RandyHaupert
{

public static void main (String [] args)

{

int quarters, dimes, nickels, pennies;
double totalamount = 0;

String input = JOptionPane.showInputDialog (null, "How many quaters do you have. " );
quarters = Integer.parseInt (input);

quarters = Coins.getQuarters (dimes);

}

}

import java.text.DecimalFormat;

public class Coins

{
public final DecimalFormat MONEY = new DecimalFormat( "$#,##0.00" );

public Coins( int newQuarters, int newDimes, int newNickels, int newPennies )
{

setQuarters( newQuarters );
setDimes( newDimes );
setNickels( newNickels );
setPennies( newPennies );
}
/** getQuarters method
* @return number of dimes
*/
public int getQuarters( )
{
if (Quarters == 0)
{
System.out.print ("You have no quarters.\n" );
}
else
{
return Quarters;
}
}

}

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C:\Users\Randy\Documents\Trine University\CS113 Java Programming\Chapter7Prog1RandyHaupert.java:26: error: class, interface, or enum expected
import java.text.DecimalFormat;
^
1 error

Tool completed with exit code 1

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You need to put all of the import statements together at the beginning of the file.

Each public class must go in its own file with a filename the same as the classname.

Norm,

Thank you for your reply. I understand about moving the import statement but I don't understand about the class and it's file name.

Randy

I don't understand about the class and it's file name.

What part? The names must be the same for a public class.
do you know what a class name is?
do you know what a filename is?

I thought that the class name was the name for program like "Chapter7Prog1RandyHaupert" for the main program and "Coins" for what I would call my function. I guess I do not understand what the filename is though.

I do not understand what the filename is

I'm sure you know what a filename is.

I'm taking about the name the OS gives to a file. What you see when you look at the contents of a directory.

Ok, I think the light bulb just went on dimly, so does the main program look in the .java directory when I tell it to call the (function)(class) "Coins"

Your concepts seem confused.
The code in a method (all methods are in a class) can call another method that can be in another class or in the same class.
That has nothing to do with a .java directory.

.java looks more like a file's extension than the name of a directory.